Compact fiber-ring resonator for blue external cavity diode laser stabilization

Perin, Georges; Mammez, Dominique; Congar, Antoine; Besnard, Pascal; Manamanni, Karim; Roncin, Vincent; Burck, Frédéric Du; Trebaol, Stéphane

doi:10.1364/oe.435513

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Cited by 5 publications

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Sub-20 kHz low-frequency noise near ultraviolet butt-coupled fiber Bragg grating external cavity laser diode

Kervazo,

Perin,

Congar

et al. 2024

Applied Physics Letters

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We present a butt-coupled InGaN fiber Bragg grating (FBG) semiconductor laser diode operating below 400 nm in the single-mode emission regime. This compact coherent laser source exhibits an intrinsic linewidth of 14 kHz in the near-UV range and a side-mode suppression ratio reaching up to 40 dB accompanied by almost 2 mW output power. Furthermore, the properties of the FBG, including its central wavelength, bandwidth, and reflectivity, can be readily customized to fulfill specific requirements. As a result, the small footprint design of this laser is compatible with integration into a standard butterfly package to ease the lab-to-market technology transfer. The combination of low-frequency noise and fibered output signal positions these FBG laser systems as strong candidates for hybridization with integrated photonic platforms tailored for quantum information processing and metrology.

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